/******************************************************************************
 * Qwt Widget Library
 * Copyright (C) 1997   Josef Wilgen
 * Copyright (C) 2002   Uwe Rathmann
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the Qwt License, Version 1.0
 *****************************************************************************/

#ifndef QWT_PLOT_MAGNIFIER_H
#define QWT_PLOT_MAGNIFIER_H

#include "qwt_global.h"
#include "qwt_axis_id.h"
#include "qwt_magnifier.h"

class QwtPlot;

/*!
   \brief QwtPlotMagnifier provides zooming, by magnifying in steps.

   Using QwtPlotMagnifier a plot can be zoomed in/out in steps using
   keys, the mouse wheel or moving a mouse button in vertical direction.

   Together with QwtPlotZoomer and QwtPlotPanner it is possible to implement
   individual and powerful navigation of the plot canvas.

   \sa QwtPlotZoomer, QwtPlotPanner, QwtPlot
 */
class QWT_EXPORT QwtPlotMagnifier : public QwtMagnifier
{
  Q_OBJECT

public:
  explicit QwtPlotMagnifier(QWidget *);
  virtual ~QwtPlotMagnifier();

  void setAxisEnabled(QwtAxisId, bool on);
  bool isAxisEnabled(QwtAxisId) const;

  QWidget *canvas();
  const QWidget *canvas() const;

  QwtPlot *plot();
  const QwtPlot *plot() const;

public Q_SLOTS:
  virtual void rescale(double factor) QWT_OVERRIDE;

private:
  class PrivateData;
  PrivateData *m_data;
};

#endif
